Ahem, poor Hobbit references aside, I was wondering if anyone could point out for me how to return to my basic campaign - Prophecies in this case - after going to Eye of the North. I'd like to dip into EotN to pick up some heroes, but I've never actually gone to the expansion before.

I apologize if there's an answer to this question already somewhere on these forums. I did look, honest! I've had plenty of luck finding how to get TO EotN, but none on how to return.

It's very simple. The EotN content takes place on the same map as Prophecies so all you need to do is open it up and map travel to Lion's Arch (or wherever you want to go). Factions and Nightfall characters who don't have access to any outposts in Prophecies need to use the Asura Gate which appears on the map (Prophecies characters can do this too).